Production method of inorganic fiber by using red mud and fly ash

A technology of inorganic fiber and fly ash, which is applied in the direction of glass manufacturing equipment and manufacturing tools, etc., can solve the problems that there are no literature and reports on inorganic fiber, and achieve the effects of low production cost, obvious economic benefits, and coke saving

Inactive Publication Date: 2011-04-06
HENAN ENERGY AND CHEMICAL INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] After reviewing the literature, there is no literature or report on the use of red mud, fly ash, quicklime with high calcium oxide content, and industrial solid waste as raw materials to produce inorganic fibers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The mass of fly ash and Bayer process red mud is taken as 1:1, and the weight of carbide slag is 50% of the sum of the weight of fly ash and Bayer process red mud. Stir the above-mentioned raw materials evenly, add water, stir to form, and carry out steam curing to obtain block-shaped raw materials with certain strength. Put the coke and raw materials into the cupola according to a certain ratio, heat and melt in the cupola, the melting temperature is 1400 ℃, the melt of inorganic fibers in the furnace flows into the four-roll centrifuge, and the four-roll centrifuge rotates the melt at high speed The fluid flies out at a very high speed, forming inorganic fibers with a diameter of 3.5 μm and a length of 7-20 cm. The iron slag flows out from the taphole at the lower side of the cupola, and the iron is recovered.

Embodiment 2

[0025] The mass ratio of fly ash to sintering red mud is 0.8:1, and the weight of carbide slag is 40% of the total weight of fly ash and sintering red mud. Stir the above raw materials evenly, add water, stir to form, and dry naturally to obtain a block-shaped raw material with a certain strength. Put coke and bulk raw materials into the cupola according to a certain proportion, heat and melt in the furnace, the melting temperature is 1450°C, the melt of inorganic fibers in the furnace flows into the four-roll centrifuge, and the four-roll centrifuge rotates the molten The fluid is thrown out at a very high speed to form inorganic fibers with a diameter of 5.0 μm and a length of 7 to 20 cm. The iron slag flows out from the taphole at the lower side of the cupola, and the iron is recovered.

Embodiment 3

[0027] The weight ratio of fly ash and Bayer process red mud is 1:1, and the weight of magnesium slag is 55% of the total weight of fly ash and Bayer process red mud. The block material making, melting and fiber-forming processes are the same as those in Example 1, and will not be described again.

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Abstract

The invention discloses a production method of inorganic fiber by using red mud and fly ash, mainly comprising the following steps: using the red mud and the fly ash as the raw materials, mixing the raw materials with the one or more of quick lime and industrial solid slag at certain ratio, adding the water, and drying naturally or stream-curing to form the block materials, mixing the raw materials with the coke at certain ratio in a cupola furnace, performing the high temperature melting to obtain inorganic fiber melt, and enabling the melt to flow into a four-roller centrifuge, throwing the melt at extremely high speed through the high-speed rotation of the four-roller centrifuge to form the inorganic fiber with the diameter of 3 to 7 mu m and the length of 7 to 20 cm, and discharging the iron slag from an iron notch at the side bottom of the cupola furnace to recover the iron. The method of the invention transforms the wastes and the harms into treasures, and reduces environmental pollution of the red mud, the fly ash and the industrial solid slag with high calcium content. The method of the invention makes the full use of the resources such as Al2O3, SiO2, Na2O, CaO and Fe2O3 in the red mud, the fly ash and the industrial solid slag with high calcium content, recycles the waste materials, saves the coke and has low production cost.

Description

Technical field: [0001] The invention relates to a method for producing inorganic fiber, especially a method for producing inorganic fiber by using red mud and fly ash. Background technique [0002] Fly ash is a solid waste discharged from coal-fired power plants. my country is a country where coal is the main energy source. Every year, coal-fired power plants discharge more than 300 million tons of fly ash, which has a certain impact on the ecological environment. Fly ash Utilization, mainly in building materials. Utilize fly ash to produce the existing patent and bibliographical report of inorganic fiber: as Chinese patent CN87105254A, this patent is made fly ash block and coke according to optimum ratio and adds in the cupola and melts with fly ash, unslaked lime and phosphorus slag, Then use a high-speed centrifuge to shake it into rock wool. Chinese patent CN1579978A is a method for producing superfine fibers with fly ash as a raw material, which is to mix and granulat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/00
Inventor 李伍成丁建础赵东峰蒋元力张秀全贾金才刘宏建王占修徐才华李宗耀徐柳
Owner HENAN ENERGY AND CHEMICAL INDUSTRY
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